Answer:
The sequence is geometric
The common ratio is 0.5
Step-by-step explanation:
In the arithmetic sequence, there is a common difference between each two consecutive terms
In the geometric sequence, there is a common ratio between each two consecutive terms
Let us check the given sequence
The first 3 terms are 12, 6, 3
6 - 12 = -6
3 - 6 = -3
There is no common difference between the consecutive terms
The sequence is not an arithmetic sequence
6 ÷ 12 = 0.5
3 ÷ 6 = 0.5
There is a common ratio between each two consecutive terms
The sequence is a geometric sequence
The common ratio is 0.5
